Deputy director of agriculture , fisheries and conservation dr liu kwei - kin said at a media briefing that two other chicken farms in pak sha have already been depopulated earlier because of the detection of h5 virus and the finding of some dead chickens . since then , afcd has been monitoring closely chicken farms in pak sha 渔农自然护理署副署长廖季坚今日(四月六日)在记者简报会上表示,自上次在白沙区有两个鸡场因发现h5病毒及鸡只死亡而需要销毁鸡只后,渔护署一直密切监察该区鸡场的情况。